I have a 2014 Nissan NV3500 van with a CEL showing codes P0446 and P0447 evap codes. I’ve replaced the evap solenoid and confirmed with 12v that it does open and close as it’s supposed to. I’ve bought a new evap canister, and then replaced the fuel tank filler tube assembly and nothing fixed the code. Finally, I checked the harness connecting to the fuel vent solenoid and found it only outputs 8-9volts and I believe this is not enough voltage to open/close the solenoid. Can you help share a wire diagram or info on if the solenoid gets its voltage directly from the ECU or if it could be a bad ground causing low voltage? Thanks
